buttolph



May 24, 1927.

L. J. BUTTQLPH WATER COOLED LAMP Original Filed Avril 12. 1922 Patented May 24, `1927.

UNITED STATES PATENT OFFICE.

LEROY J'. BUTTOLPH, OF EAST ORANGE, NEW JERSEY, ASSIGNOR TO COOPER'HEWITT ELEC'JIRIC COMPANY, HOBOKEN, NEW JERSEY,.A CORPORATION OF NEW JERSEY.`

WATER-coonnn vLAMP.

y Original application filed April 12, 1922, Serial No. 551,768. Divided and this` application filed December f 10, 1923. ySerial No. 679,809.

The present invention relates lto anelectric light radiating apparatus useful in the arts generally and particularly in the therapeutic, art where diseases are treated by means ofradiations from a light vsource giving ofi' ultra violet rays' andlias for its object to provide such an apparatus which can be manipulated readily by'hand by the operator. c

I have discovered, `when operating a quartz lamp having a solid anode and a liquid cathode therein and an arc path of one or twoy inches on Commercial circuits that it is impossible to maintain such a small sized lamp in` elicient operationon commercial circuits `without the use of external/heat radiating devices. Accordingly, in myJ new apparatus, I surround the lamp and particularly the electrode portions of the rcontainer of sucha lamp with cooling devices or chambers operating to maintain the temperature f of the radiant current stream between the electrodes at vthe desired operating temperu ature for giving the maximum amount of plight,v in those cases where illumination is desired and-the maximum quantity of ultra violet radiations in those cases where such radiations are desired; v

,By availing of the cooperating action of y the cooling ackets for the luminous column, and jackets for the terminals orA electrode portions of the lamp, I am enabled to make efficient devices of large and small sizes and the invention lends itself particularly to the production offasmall hand `lamp for use as a therapeutic lamp or agbulls eye lamp, although it is to be understood that my invention is not limited to small sized outfits.v

struction, theleadin Vdevicescommon to the end portions or terminals ofthese tubes lis protected froinvthe disintegrating effectsof radiant energy andl from lcorrosive vapors or Igases developed. in: that portion kofthe outfit adjacentrto theV luminous tube.

, @I have villustrated my vinvention the accompanying drawings inwhicli Figure 1V is a vertical section of my artificially cooled hand lamp, showing the external cooling inevdiuin applied directly to the portions of the lamp tube containing the electrodes; Figure 2 isa plan View along the line 2, 2 of Figure 1; Figure 3 is a vertical section of my artificially cooled lamp showing thel tension chamber, 7, the inner walls of which are in contact with the wall of the container, 1, in the neighborhood of the anode, 2, or in close proximity thereto, and an extension chamber, 8, the walls of which are in contact with the wallsof the lamp, 1, in the neighborhood of the electrode 3, or in close proximity thereto,tlie chambers 7 and 8 communicating with each other through `an opening in the lens mounting mechanism presently to be described, and inlet andouta handle, 11, of hard rubber or other suitable material.

The lamp, 1, is connected to a. suitable source of current through the conductors 12 and 18, said conductors being passed through the wall of the acket, 6, and insulated therefrom, if desired, the conductor, 12, being connected to the lead wire, 4, of the electrode 2 and the conductor, 13, being passed down through the `chambers 6 and 7 and insulated therefrom by bushings, 26, 26, and connected `to the lead wire, 5, of the elec- VVtrode 3. The portion ofthe lead lffjoined to the leaddevice 5 may be strong enough fmechanically tohold ythe, lamp in place or a spring 14 may be provided lfor cushioning and supporting the lamp inthe jacket. vAt the top spring clips 15-15 are provided for fholdin'g the lamp in place at that point.

The lenses 16 and 17 are held in place'in a rscrewthreaded opening in the jacket 6 by means `of screw threaded rings 18,18, 18, 18, ai suitable opening' 19 being provided for the ico i passage of the circulating cooling medium betweenY the lenses.

Referring to Figure 3, the construction, generally, is similar tothat described in connection with Figure 1, except thatthe water jacket constituted by the jacket 6, the pipe 1() and the passage 19 through the lens `mount and connecting the chambers 7 and S, is extended entirely around the lamp as shown at and brought into close proximity to the luminous portion of the lamp tube, 1, between the extensions 7 and 8, and a flat spring, 17, is shown for cushioning the lamp 1.

In Figure 1 an alternative lens mounting is employed in which the lens 16 is held in place by a screw ring 18, compressing the lens 16 againsta washer of rubber, 22, and the outer lens 17 is held in place by a screw cap, 23, compressing the lens 17 against a washer 2-1 of rubber' in contact with an extension of the jacket 6, the usual hole 19 for circulation of the cooling fluid between lenses being present in this construction also.

1f desired, the pipe 10 in Figure 2 may be continued through the extension 8 to a point where it discharges in the neighborhood of the lenses 16 and 17, as shown in Figure 3, to insure that these devices shall be properly cooled in the operation of the devices.

In the operation of the device, the circulating medium is started and flows from inlet 10 through extension 8 up through the holes 19 in the lens mounting into the eX- tension 7 and around the lamp to the outlet pipe 9 and back to the source. With the Cooling fluid in circulation, the lamp 1 is started into operation by tilting the outt so that the mercury of the electrode 3 bridges the gap between the electrodes 2 and 3 and then breaks the connection thus established whereupon the arc is formed between the electrodes just mentioned. At the insant of starting because of the low temperature in the lamp the voltage drop across it is low and is controlled by the stabilizing resistance in the auxiliaries usual to such lamps and not here shown. rent is necessarily high and the mercury electrode 3 heats up rapidly raising the vapor pressure of the mercury in the lamp and at the same time raising the arc voltage.

T his process continues until such time as theV heat energy 1n the lamp establishes equilibrium with the cooling members about theV electrode portions. This equilibrium temperature is determined by the relative areas of the extensions of the jacket 6 and the electrode portions of lthe lamp that are in close proximity. It is thus obvious that: the volt-ampere characteristic is controlled by this control of heat equilibrium at the point of greatest sensitivity since the volt-ampere characteristic of the burner itself is dependlThis initial curent primarily on the pressure of the mercury vapor in the gas or arc space. It follows from the foregoing then that the operation of the outfit for any given set of .conditions maybe controlled and varied by Varying the cooling effect of the circulating medium or through varying the electrical regulating devices in the auxiliary mechanism of the lamp, but it is preferred for any given setting of the lamp and its control mechanism to vary the volt-ampere characteristic of the lamp by varying the rate of cooling asset forth above. The above is true not only of the small lamps illustrated herein but applies equally woll forthe larger sizes of quartz lamps now on the market.

ylhe radiations to be utilized either in therapy or in general illumination pass through the lenses 16 and 17 with the water between them which serves to cool the lenses and to take out the radiant energy which the cooling .medium may absorb, although it will be understood that the heat rays may also be utilized for useful purposes in which case the cooling medium must be selected that is transparent to the said rays. This latter of course is a matter of design and selection well within the ken of those skilled in the art.

The outfit may be hung on a suitable standard with a swivel connection thereto and manipulated with the assistance of the handle 11.

The lamp 1 is provided with certain struetural features which are important in the operation of the lamp generally whether forming part of the cooled outfit or burning independently of such out-lit in the usual way. The container is contracted as shown at 27 in the neighborhood of the level of the liquid constituting the electrode 3, and serves to localize the cathode spot when the lamp is operating and that part of the lead wire 5 which is inside V the container is brought up near the surface of the liquid electrode 3 and is of spiral form. This construction insures that the lead wire 5 is always in contact with the material of the electrode 3, and particularly in the starting up of the apparatus when it is tilted to stream the mercury tothe anode 2, when the mercury is partially emptied out of the pocket at the lower Yend of the lamp.

Y The tungsten anode 2 in the lamp 1 may be a. plate or a spiral, and in either event it is provided with a'projection, 28, which lserves to hold the arc at this point of the electrode 2 and prevent the wandering of the arc spot over the surface of the anode 2.

The top, 29, and the bottom,`30, of the jacket 6 are removable and when the lamp outfit is assembled, the lamp `1 is inserted through thebottom until the top thereof comes in contact with the clips 15-15 whereupon the spring clip, 31, is fastened i ee to the outer end of the lead wire 4 andthe part of the lead 13 connected to the lead 5 is joined to the main lead 13 as shown at 32. The cover 29 is' then put on the top and the bottom part 30 with the spring 14 or the spring 21 is put in place to close off the bottom of the jacket 6.

. This application is a division of my application, Serial Number 551,768, filed April 12th, 1922.

I claim:

1. A therapeutic lamp housing providing two spaced apart casings and two spaced apart lenses for circulation of a liquid'between the casingsy and between the lenses and a lalnp in theinner casing.

2. A therapeutic appliance having rtwo concentric spaced apart casings, leaving a liquid circulating space therebetween; two spaced apart lenses, one in each casing, the

. space therebetween communicating with vsaid circulating space; a handle projecting lat- 1 erally from the outer casing; liquid circulating pipespassing through thel handle into the circulating space; a lamp in the inner casing and electric conductors passing through the handle into the inner` casing to contact wit-h the terminal ends of said lamp.

3. A therapeutic appliance for application of radiant energy comprising a casing; two spaced apart lenses supported thereby; a lamp in the casing and means to circulate water about the lamp and between the lenses.

4. A therapeutic` appliance for application of' radiant energy comprising a casing structure; two spaced apart lenses supported thereby; a lamp in the casing; a path thru which to circulate water about the lamp and between the lenses; a handle on one side of the casing; and water conduits passing thruv the handle. and communicating with said path.

5. A therapeut-ic appliance having a .v double walled lamp housing and a lens in each wall forming a continuous fluid circulating chamber, a lamp support within the housing, and a'handle for the housing and` through which fluid and electrical connections may be made to the circulating chamber and the lamp respectively.

6. A therapeutic appliancecomprising-a housing having double walls which form a fluid circulating chamber about a lamp, a

pair of' lenses fitted to the housing walls to complete the circulating chamber and permit the passage of rays from a lamp, means for supporting a Vlamp tube within the inner wall of the housing, and connections for connecting a source of fluid supply to the circulating chamber.

7. A portable housing for a therapeutic lamp tube comprising inner and outer tubular casings which include axially aligned lenses, the casings being separated to form aV continuous fluid chamber about'the inner casing and between the lenses and the inner casing being open at both ends; end walls for completely closing kthe fluid chamber; fluid connections communicating with the fluid chamber; and a support for holding a lamp tube within the inner casing.

8. A portable therapeutic appliance comprising two parallel tubular side walls which include axially aligned lenses, the walls being separated to provide a continuous fluid chamber between theV walls and 'the lenses therein and to forma tubular lamp housing; end walls, between the side Walls, for closing the fluid chamber; fluid connections to the lluid chamber; and a support for holding a lamp within the tubular housing.

9. A portable therapeutic appliance comprising inner'and outer parallel tubular side walls each of which includes a lens, the walls being separated and the lenses being in axial alignmentto provide an uninterrupted fluid chamber around the inner wall and betweenV the lenses and to constitute a fluid jacketed housing for a lamp tube; end walls which interconnect the side walls to close the fluid chamber; a lainp support within the housing and for holding a lamp tube; and fluid connections communicating with the Huid chamber. y

10. A `therapeutic appliance comprising a lamp housing having double walls and a lens for each wall to form a fluid circulating chamber about a lamp, a lamp holder within the housing, a handle for the housing,y

fluid'and electrical connections for the circulating chamber and the lamp, and an applicator for directing the application of rays passing through the lenses.

Signed at Hoboken in the county of Hudson and State of New Jersey this 10th day of December A. D. 1923. Y

LEROY J. BUTTOLPH.' 

